Improvement in rests for cloth-shearing machines



UNITED STATES PATENT FFIE.

AMASA XVOOLSON, OF SPRINGFIELD, VERMONT.

IMPROVEMENT IN RESTS FOR CLOTH-SHEARING MACHINES.

Specification forming part of Lciicrs Patent No. 207,09I, dated August1?, 1878; application filed March 20, 1978. 3

To all vhom it may concern..-

Be ltknown that l, AMASA WooLsoN, of Sprlngficld, 1n the countyofVindsor and State of Vermont, have invented a new and Improved Rest for(lloth-Shearin g Machines;

and that thefollowing is a full, clear, and cx-,

square and at right angles with the sides of the same, and combined witha hood which covers the ends of the several sections as they aresuccessively moved in and out of position by reason of the sliding barand slot engaging with pins affixed to said sections.

In the accompanying sheet of drawings, Figure 1 represents a rearelevation of my rest Fig. 2, a front view of same with coveringplateremoved; Fig. 3, a crosssection through line 3 y, Fig. 2 Fig. 4, across-section through line :0 as, Fig. 2, and Fig. 5 a detailview ofcam-slot.

Similar letters of reference indicate like parts in the several figures.

This invention, as above stated, pertains more particularly to rests forcloth-shearing machines which areconstructed with devices permitting theextension of the rest and the extension portion of my rest consists of aseries of nearly vertical sliding sections, A, with a pin, a, on theinner face of each section, which pin enters into a cam-slot, B, formedin a slidin g bar, 0.

The slot, for convenience of description, may be divided into threeparts, 0, f, and 9. These sections lie snugly against a plain beveledinner face, h, formed in the backing D of the rest. They lie flatwiseagainst this beveled surface, and are edge to edge, as shown in Figs. 1and 2, the edge of one section lying accurately against the edge of thesection adjoining it, the upper end of each section being than its otherpart, Z, the part It forming substantially the fixed part of my rest,and the part Z pertaining more particularly. to the extension portion ofthe same; and thepurposc of these several sections is to bring the partZ of the rest up to the same height and parallel with the part kthereof.

To accomplish this, as the sliding bar 0 slides in one direction on theface 71/ of the rest, the pins a of the sections are broughtsuccessively in contact with the part f of the cam-slot B, which willcause them to slide upward between the back of the sliding bar and theface h of the rest, against which they are placed, and as the slidingbar 0 is caused to move in an opposite direction the inclined portion fof the cam-slot forces each section successively downward and below thelevel of the fixed part 7c of the rest and the edge at of the same, sothat the reciprocating motionof the sliding bar 0 alternately raises andlowers these sections to and from the level of the fixed portion of therest before referred to.

When each section is elevated to its properheight, the pins to of thesections enter into the part c of the cam-slot B, which retains thesections A in their elevated position straight and parallel with theedge of the fixed rest, and when each section is forced downward it isretained in this lower position by the pins a entering into the part 9of the cam-slot, so that the part I of the rest may be built up, as itwere, to the level of the part 76 thereof by the several upper ends ofthe entire series of sections, these upper ends, when in their elevatedposition, substantially forming a prolongation of the part k of the restto an extent only limited by the number of sections and the length ofthe sliding bar, the slot therein, and its throw. Therefore, when thecloth passes rapidly over the rest to be sheared by the cutting-blades,the extension portion of the rest formed by these several sections, ortheir upper ends, presents as smooth, sub

stantial, and as unobstructed a surface for the passage and support ofthe cloth as does the fixed or unadjustable part 7;. Now, as is obvious,if the cloth, or, more strictly speaking, the selvage of the cloth, asit passes over the extension portion of the rest, were permitted to comein contact with one or more of the sharp corners of each section as theyare raised or lowered in position, the selvage would catch and beinjured or torn, and the shearing operation disarranged. To obviatethis, I protect the ends of each section, as it is successively raisedor lowered, by a hood, E. This hood is secured to the sliding bar 0, sothat it is necessarily moved with. said bar, following each section asit is'raised or lowered and successively coverin g them. To accomplishthis result thehood should be fixed to the sliding bar 0 immediatelyover that portion of the same wherein is formed the part f of theca1n-slotB,'so that its position will at all times correspond with thispart of the cam, which elevates and lowers the several sections insuccession. This hood E, while it protects the list from catching in thesharp angles of the ends of theseveral sections, also permits the listto drop below the surface of the rest and clear from the shearing actionof the cutting-blades, preserving the list or selvage unshorn.

The sliding bar 0 (to describe the operation of my rest) is rcciprocatedright and left by the operation of a double ratchet-bar, F, inconnection with feelers G and cams H, substantially as is described inLetters Patent heretofore issued to me on the 16th day of August, 1864,and which need not therefore be particularly described here. As thisratchet-bar is reciproeated by power in any desirable manner, the clothpasses over the rest, and the length of the bearing-edge m of the restis extended to a greater or less degree, as the width of the clothrequires, the extension being antomatically accomplished bythe list,which, when in contact with the feelers G, causes the severalsections'to be elevated and prolong the bearing-edge m, and, when thelist is not in contact with the feelers, causing the several sections tobe depressed and the length of the edge of the rest reduced, in themanner heretofore described. By this means the list at all timesmaintains a straight direction over the edge of the rest, and the clothis sheared up to the list in a straight unbroken line, the listremaining unshorn.

To the sliding bar 0 is also fixed a plate, I,

which forms a surface to guide the passage of the cloth over thepermanent part 70 of the rest, as well as the extension portions lof thesame;

and also to the rest is fixed a plate, J, which.

forms a smooth surface for the list as it passes onto it from the hoodE. The plate I has its edge sharpened, so that its upper edge is substantially in the same plane as the edge on of the rest. Asurface-plate, K, is fixed to the backing, and this forms a cover andguide to the cloth.

Instead of providing each of the sections A with a pin to enter into thecam-slot of the sliding bar, it is obvious that slots may be formed inthe sections so that they will be operated by one'or more pins in thesliding bar, producing substantially the same operation. However, aseries of sect-ions with pins combined with a cam-slot in a sliding barhaving been shown and claimed in an application for a patent filedsimultaneously herewith, the same are in this application disclaimed.

Many of the minor details of construction may be varied without changingthe features of my invention; but

What I claim as new, and desire 'to secure by Letters Patent, is-

1. A cloth-shearing rest constructed with a series ofvertically-adjustable sections, each section constructed with squareedges, and with their ends also square and at right angles to saidedges, in combination with a hood, whereby the cloth is protected fromsaid air gular ends, substantially as described and shown.

2. In a cloth-shearing rest, a series of vertically-adjustable sections,provided with pins affixed thereto or slots formed therein, incombination with a sliding bar having a cam formed therein or thereon,and mechanism, such as described, for operating the same, whereby thesaid sections are automatically raised and lowered by the action of thecloth, essentially as specified.

AMASA WOOLSON.

Witnesses H. F. BARNARD, HENRY OLossoN.

